| Category | Achievement |
| Sub Achievement | Challenger: Series II |
| Reward | 5 Primogems |
Requirement
Defeat every type of Hydro Mimic that an Oceanid can summon.
Hydro Hunter
| Category | Achievement |
| Sub Achievement | Challenger: Series II |
| Reward | 5 Primogems |
Defeat every type of Hydro Mimic that an Oceanid can summon.
